.scrollup {
    width: 50px;
    height: 50px;
    position: fixed;
    bottom: 150px;
    right: 50px;
    cursor: pointer;
    opacity: 1;
    display: none;
    text-indent: -9999px;
    background: url('scroll2up.png') no-repeat;
    z-index: 9999
}